38993780 has 48 divisors (see below), whose sum is σ = 94080000. Its totient is φ = 13298688.

The previous prime is 38993771. The next prime is 38993797. The reversal of 38993780 is 8739983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30596 + ... + 31844.

It is an arithmetic number, because the mean of its divisors is an integer number (1960000).

Almost surely, 2^38993780 is an apocalyptic number.

It is a pronic number, being equal to 6244×6245.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38993780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47040000).

38993780 is an abundant number, since it is smaller than the sum of its proper divisors (55086220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38993780 is a wasteful number, since it uses less digits than its factorization.

38993780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 38993780 is about 6244.4999799824. The cubic root of 38993780 is about 339.1031148513.

The spelling of 38993780 in words is "thirty-eight million, nine hundred ninety-three thousand, seven hundred eighty".